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True/False Collision-KE

  1. Mar 18, 2009 #1
    It is not possible for a system to lose all of its kinetic energy in a collision.

    A) True
    B) False

    This question seems really tricky, but I believe the answer to be A: true. Even if two identical masses are approaching eachother head-on at the same velocity (two billiard balls), when they collide they bounce off each other and continue with KE. Is this right?
  2. jcsd
  3. Mar 18, 2009 #2


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    Homework Helper

    That is true for elastic collisions.

    What about inelastic collisions - say 2 equal balls of damp clay that deform and stick together?
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